package com.atguigu.gulimall.cart.vo;

import lombok.Data;

import java.io.Serializable;
import java.math.BigDecimal;
import java.util.List;

/**
 * 整个购物车
 *  需要计算的属性，必须重写他的get方法，保证每次获取属性都会进行计算
 * @author xiaoping
 * @create 2020/7/1 18:36
 * @since 1.0.0
 */
@Data
public class Cart implements Serializable {

    List<CartItem> items;
    /**
     * 商品数量
     */
    private Integer countNum;
    /**
     * 商品类型数量
     */
    private Integer countType;
    /**
     * 商品总价
     */
    private BigDecimal totalAmount;
    /**
     * 减免价格
     */
    private BigDecimal reduce = new BigDecimal(0);

    public List<CartItem> getItems() {
        return items;
    }

    public void setItems(List<CartItem> items) {
        this.items = items;
    }

    public Integer getCountNum() {
         int count = 0;
         if (items != null && items.size() > 0){
             for (CartItem item : items) {
                 count += item.getCount();
             }
         }
        return count;
    }

    public Integer getCountType() {
        int count = 0;
        if (items != null && items.size() > 0){
            for (CartItem item : items) {
                count += 1;
            }
        }
        return count;
    }


    public BigDecimal getTotalAmount() {
        BigDecimal amount = new BigDecimal(0);
        //1，计算购物项总价
        if (items != null && items.size() > 0){
            for (CartItem item : items) {
                if (item.getCheck()){
                    BigDecimal totalPrice = item.getTotalPrice();
                    amount = amount.add(totalPrice);
                }
            }
        }
        //2，减去优惠总价
        return amount.subtract(getReduce());
    }

    public BigDecimal getReduce() {
        return reduce;
    }

    public void setReduce(BigDecimal reduce) {
        this.reduce = reduce;
    }
}
